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Jurors convicted five defendants  including the group’s ringleader, Narseal Batiste, who now faces up to 70 years in prison  and acquitted one. Only Mr. Batiste was convicted on all four charges in the federal indictment.

The decision was a hard-fought victory for prosecutors, who had been accused by critics of the Bush administration of letting politics infect a case that had begun just a few months before the 2006 midterm elections and cost $5 million to $10 million.

“This was a difficult trial,” the United States attorney, R. Alexander Acosta, said. “And we thank all the prosecutors and agents involved, whose efforts resulted in today’s successful conclusion.” Defense lawyers said they would petition for a new trial within 30 days.

Some legal scholars said the case would continue to be viewed as an example of the Bush administration’s overzealous approach to terrorism prosecutions.

“The past cases ending in hung juries showed that the Justice Department had trouble matching the evidence with their rhetoric,” said Jonathan Turley, a professor at George Washington Law School. Professor Turley added, “It goes to show that if you try it enough times, you’ll eventually find a jury that will convict on very little evidence.”

Michael Tein, who spent five years working in the United States attorney’s office in Miami, agreed. “If you sledgehammer the square peg three times, eventually you’re going to blast it into the round hole,” Mr. Tein said. “This isn’t a terrorism case; it’s an overcharged gang case.”

The verdict did not come without drama. It took more than two weeks of deliberation and the replacement of two jurors; one fell ill, another refused to deliberate because of a falling out with other jurors.

On Tuesday morning, the racially mixed jury of nine women and three men told Judge Joan A. Lenard that they were still deadlocked on one count and one defendant. She told them to keep trying.

In two previous trials, the prosecution failed to convince jurors that the defendants, most of them poor and of Haitian descent  Mr. Batiste, 35; Patrick Abraham, 29; Stanley Grant Phanor, 33; Rotschild Augustine, 25; Burson Augustin, 24; and Naudimar Herrera, 25  were serious terrorists who had trained to wage terror attacks throughout the United States.

Attorney General Alberto R. Gonzales said in 2006 that the men had been taped promising to fight a “full ground war against the United States.”

But the first trial ended in December 2007 with a seventh defendant, Lyglenson Lemorin, acquitted. On the other six, the jury deadlocked. Another jury failed to reach verdicts in 2008.

In those trials, defense lawyers appeared to have successfully argued that the men known as the Liberty City Seven were not a serious threat. No weapons or plans had been found at the rundown warehouse in the Liberty City neighborhood that was said to be their headquarters.

This time, the evidence was much the same  the case turned largely on recorded conversations with an informant, who led the group in a pledge of allegiance to Al Qaeda  but the results differed.

Mr. Herrera was acquitted. Mr. Augustine, Mr. Phanor and Mr. Augustin were convicted on two counts of providing “material support” to a terrorist organization. They face up to 30 years in prison.

Mr. Abraham was convicted on three counts and faces 50 years behind bars.

The jurors did not comment after the verdict was read, moving quickly from the downtown Miami courtroom. Prosecutors sat stone-faced initially, as friends and relatives of the defendants moved toward the elevators, crying. Danielle Augustine, the wife of Mr. Augustine said her husband “is an innocent man convicted of something he didn’t do.”

Mr. Herrera, the lone defendant found not guilty, was quickly surrounded by supporters, who clutched him close with tears in their eyes.

“It’s just not right,” he said, in a hallway just outside the courtroom. “They don’t deserve this.”

Like the lawyers representing the others, he said the case would continue. “I know them,” he said. “They are going to come back and fight this. This ain’t over.”

Conviction in Qaeda Plot

A federal jury in New York on Tuesday convicted a Lebanese-born Swede of plotting to help Al Qaeda recruit by trying to set up a weapons-training post in Oregon and distributing terrorist training manuals over the Internet.

The verdict against the defendant, Oussama Kassir, capped a three-week trial that featured the testimony of an American-born Muslim convert who said he tried to create the training camp in Bly, Ore., in 1999.

Prosecutors portrayed Mr. Kassir as a follower of militant clerics who wanted to take advantage of more relaxed gun laws to arrange training in the United States for European recruits to Islamic militancy.

Defense lawyers said Mr. Kassir never conspired with anyone to train recruits and did not provide anything on Web sites that was not available on many other sites or at the local library.

Sentencing was scheduled for Sept. 2. THE ASSOCIATED PRESS

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US »A version of this article appeared in print on May 13, 2009, on page A19 of the New York edition.